Code:
// Cardiograph.cpp : Defines the entry point for the application.
//
#include "stdafx.h"
#include "Cardiograph.h"
#define MAX_LOADSTRING 100
// Global Variables:
HINSTANCE hInst; // current instance
HWND hWnd; // I added this to keep track of window
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
MSG msg;
Gdiplus::GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
// Initialize GDI+.
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_KARDIOGRAPH, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow)) return FALSE;
//Creating the timer
SetTimer(hWnd,0, 800, NULL);
// Main message loop that is reorginized:
while(GetMessage(&msg, NULL, 0, 0))
{
DispatchMessage(&msg);
}
//Destructions
Gdiplus::GdiplusShutdown(gdiplusToken);
KillTimer(hWnd, 0);
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
// COMMENTS:
//
// This function and its usage are only necessary if you want this code
// to be compatible with Win32 systems prior to the 'RegisterClassEx'
// function that was added to Windows 95. It is important to call this function
// so that the application will get 'well formed' small icons associated
// with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_KARDIOGRAPH));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassEx(&wcex);
}
//
// FUNCTION: InitInstance(HINSTANCE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
// HWND hWnd; I made it global but not sure if its a good practice
hInst = hInstance; // Store instance handle in our global variable
POINT pt = {0,0};
HMONITOR hMonitor = MonitorFromPoint(pt,MONITOR_DEFAULTTOPRIMARY);
MONITORINFO mi;
mi.cbSize = sizeof(MONITORINFO);
GetMonitorInfo(hMonitor, &mi);
hWnd = CreateWindowEx(WS_EX_TOOLWINDOW,szWindowClass, szTitle, WS_BORDER|WS_SYSMENU ,
mi.rcMonitor.right - 270, 0, 270, 80, NULL, NULL, hInstance, NULL);
if (!hWnd) return FALSE;
ShowWindow(hWnd, nCmdShow);
return TRUE;
}
VOID OnPaint(HDC hdc,int a)
{
Gdiplus::Graphics graphics(hdc);
Gdiplus::SolidBrush sBrush(Gdiplus::Color(a,255,0,0));
graphics.FillRectangle(&sBrush, Gdiplus::Rect(0,0,a+15,80));
}
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu - No menu so code deleted!
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
switch (message)
{
case WM_TIMER:
RedrawWindow(hWnd, NULL, NULL, RDW_UPDATENOW|RDW_ERASE|RDW_INVALIDATE);
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
OnPaint(hdc,(GetTickCount()/10)%256); //DrawRect
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
